V10.535 優化 ElephantAlpha 價格 trigger 查詢

tests/test_elephant_alpha_engine.py

@@ -198,6 +198,43 @@ def test_execute_autonomous_decision_uses_db_evidence_without_hermes_prefetch(mo
     assert notified == ["price_drop_alert"]
 
 
+def test_price_trigger_queries_use_lateral_latest_price_lookup(monkeypatch):
+    import services.elephant_alpha_autonomous_engine as engine_module
+    from services.elephant_alpha_autonomous_engine import (
+        AutonomousTrigger,
+        ElephantAlphaAutonomousEngine,
+    )
+
+    captured_sql = []
+
+    class _FakeResult:
+        def mappings(self):
+            return self
+
+        def fetchall(self):
+            return []
+
+    class _FakeSession:
+        def execute(self, statement, params=None):
+            captured_sql.append(str(statement))
+            return _FakeResult()
+
+        def close(self):
+            return None
+
+    monkeypatch.setattr(engine_module, "get_session", lambda: _FakeSession())
+
+    engine = ElephantAlphaAutonomousEngine()
+    asyncio.run(engine._check_price_drop_trigger(AutonomousTrigger("price_drop_alert", {}, 0.8, True)))
+    asyncio.run(engine._check_market_opportunity_trigger(AutonomousTrigger("market_opportunity", {}, 0.8, True)))
+    assert engine._fetch_recent_competitor_evidence_actions(top_n=2) is None
+
+    assert len(captured_sql) == 3
+    assert all("JOIN LATERAL" in sql for sql in captured_sql)
+    assert all("SELECT DISTINCT ON (product_id)" not in sql for sql in captured_sql)
+    assert all("latest_momo" not in sql for sql in captured_sql)
+
+
 def test_escalate_resource_optimization_without_evidence_is_suppressed(monkeypatch):
     import services.elephant_alpha_autonomous_engine as engine_module
     from services.elephant_alpha_autonomous_engine import (